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2014-07-18T20:42:46+05:30
A volcano is a mountain that opens downwards to a pool of molten rocks below the surface of the earth. When pressure builds up, erruptions occur. 
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2014-07-18T21:43:10+05:30

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The Earth's crust is full of molten hot lava which erupts if it finds any free area on the Earth's area.
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